hi keith, I was posting the grid for those who might not have the grid after basics and yes, I see the m-wing and there is a w-wing
the w-wing has the strong link on 5 in col 9.
both will take you a long way. the next move will have to involve stringing together some of those bi-value cells (xy-chains).

In all of my No puzzles so far, XY-Chains were available to crack the puzzles ... but were never used. Interesting that this puzzle could be reduced to 27 eliminations remaining ... and still present a problem if XY/XYZ-Wings are removed from the solving techniques.

After Norm's W-Wing, an XY chain can be avoided by, for example:
(5-8)r3c7=(8)r1c7 - (8=4)r1c3 - (4)r1c2=(4-5)r7c2=(5)r3c2 - (5)r3c7; r3c7<>5
This is basically a Medusa Trap. After this, there is a BUG+1.

Perhaps the avoidance of XY chains is because they are too much like "extended" XY Wings.

Yes, that is a grouped strong link on <5> in r6 and it activate's the 59 W-Wing Norm already pointed out. You could also use the strong link on <5> in c9 to do so. But, that W-Wing is not Keith's M-Wing.

Keith wrote:

And, Asellus, if you are complaining about this move: There are no XY-wings in this grid. There is an XYZ-wing, far removed from my elimination.

I can give you a 10-link chain in this grid that makes an elimination, if you think that more satisfies your intellect?

I have no complaints about XY chains. Danny just mentioned that no one was using them and I suggested why they might be avoiding them. I prefer to try Medusa coloring over looking for XY chains. But, that's just me.

As for that first M-Wing, it performs exactly the same eliminations as, and includes all of the cells of, the XY-Wing in r5c26|r6c5. But, it IS an M-Wing (I can see it even if some others can't). Myself, I would reject using it, per Danny's challenge, since it is too close to the prohibited XY Wing. However I'm certainly not making the rules for these puzzles: Danny is. So, he can judge. It is a matter of indifference to me. And, it has nothing whatsoever to do with intellect!

Just to show that I am not being arbitrary, take a look at the thread for "Set A Puzzle 1". nataraj used a generalized M-Wing that includes XY-Wing cells and performs the same elimination, just as the case here. And, it is Danny who objects, not me.